| River Grove to Popovo | 5,267.17 mi (8,476.69 km) |
| River Grove to Provadia | 5,317.42 mi (8,557.55 km) |
| River Grove to Radnevo | 5,308.40 mi (8,543.04 km) |
| River Grove to Radomir | 5,188.25 mi (8,349.69 km) |
| River Grove to Rakitovo | 5,257.07 mi (8,460.43 km) |
| River Grove to Rakovski | 5,274.21 mi (8,488.03 km) |
| River Grove to Razgrad | 5,268.04 mi (8,478.10 km) |
| River Grove to Razlog | 5,239.31 mi (8,431.86 km) |
| River Grove to Ruse | 5,234.06 mi (8,423.40 km) |
| River Grove to Samokov | 5,220.65 mi (8,401.82 km) |
| River Grove to Sandanski | 5,247.73 mi (8,445.41 km) |
| River Grove to Sevlievo | 5,243.45 mi (8,438.52 km) |
| River Grove to Shumen | 5,295.00 mi (8,521.48 km) |
| River Grove to Silistra | 5,264.87 mi (8,472.99 km) |
| River Grove to Sliven | 5,303.67 mi (8,535.43 km) |
